Package net.ssehub.easy.varModel.cst

Class AttributeVariable

java.lang.Object

net.ssehub.easy.varModel.cst.ConstraintSyntaxTree

net.ssehub.easy.varModel.cst.Leaf

net.ssehub.easy.varModel.cst.Variable

net.ssehub.easy.varModel.cst.AttributeVariable

All Implemented Interfaces:

IAttributeAccess

public class AttributeVariable
extends Variable

A variable which represents an attribute. However, access to an attribute may be qualified, e.g. via a CompoundAccess, i.e., qualifier.attribute whereby qualifier may even be c.a.attribute of unlimited nesting. However, the attribute shall point to the original definition of the attribute variable. This class is a (polymorphic) subclass of Variable as it just adds an attribute (and helps saving memory in case that the qualifying attribute is not needed).

Author:

Holger Eichelberger

Field Summary

Fields

Modifier and Type	Field	Description
private ConstraintSyntaxTree	qualifier

Constructor Summary

Constructors

Constructor	Description
AttributeVariable()	Constructor for serialization.
AttributeVariable(ConstraintSyntaxTree qualifier, Attribute attribute)	Creates an attribute variable.

Method Summary

Modifier and Type	Method	Description
void	accept(IConstraintTreeVisitor visitor)	Visiting method for the visitor.
boolean	equals(java.lang.Object obj)
ConstraintSyntaxTree	getQualifier()	Returns the qualifier for accessing the variable, e.g., an expression to be put before.
int	hashCode()
IDatatype	inferDatatype()	Infers the datatype of the subtree represented by this object.
java.lang.String	toString()

Methods inherited from class net.ssehub.easy.varModel.cst.Variable

getAttribute, getAttributesCount, getResolved, getVariable, isSemanticallyEqual

Methods inherited from class net.ssehub.easy.varModel.cst.ConstraintSyntaxTree

getAttribute, getContainedType, getName, getParent

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

qualifier

private ConstraintSyntaxTree qualifier

Constructor Detail

AttributeVariable

AttributeVariable()

Constructor for serialization.

AttributeVariable

public AttributeVariable(ConstraintSyntaxTree qualifier,
                         Attribute attribute)

Creates an attribute variable.

Parameters:

qualifier - an optional expression required to uniquely address the specific variable the attribute is referring to (may be null)

attribute - the attribute (as variable)

Method Detail

getQualifier

public ConstraintSyntaxTree getQualifier()

Returns the qualifier for accessing the variable, e.g., an expression to be put before.

Overrides:

getQualifier in class Variable

Returns:

the qualifier (may be null)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class Variable

hashCode

public int hashCode()

Overrides:

hashCode in class Variable

toString

public java.lang.String toString()

Overrides:

toString in class Variable

accept

public void accept(IConstraintTreeVisitor visitor)

Description copied from class: ConstraintSyntaxTree

Visiting method for the visitor.
This method is used for saving this model element.

Overrides:

accept in class Variable

Parameters:

visitor - The visitor, which should save this model element.

inferDatatype

public IDatatype inferDatatype()
                        throws CSTSemanticException

Description copied from class: ConstraintSyntaxTree

Infers the datatype of the subtree represented by this object.

Overrides:

inferDatatype in class Variable

Returns:

the data type

Throws:

CSTSemanticException - Will be thrown if parameters of (sub-) trees do not fit together.